DCOA Mixed Practice Test #765

Question 1

The OPV (Oral Polio Vaccine) was developed by:

Accepted Answer

Albert Sabin — Sabin developed the oral live-attenuated vaccine; Salk developed the injectable.

Answer

Jonas Salk

Answer

Edward Jenner

Answer

Louis Pasteur

Question 2

The spinal cord in humans extends from:‌​‍

Accepted Answer

Medulla oblongata to L1/L2 vertebra — Spinal cord ends at L1/L2 in adults; beyond it is cauda equina (nerve roots).‌​‍

Answer

Brain to pelvis

Answer

Only in chest

Answer

Whole body

Question 3

Which of the following geographical features is LEAST characteristic of Kerala's 'Midland' physiographic region?

Accepted Answer

D. Significant areas of mangroves and estuarine ecosystems. — The Midland region of Kerala is primarily characterized by undulating laterite hills, fertile river valleys, and is a hub for diverse cash crop cultivation (A, B). Rivers originating from the Western Ghats traverse this region before reaching the coast (C). Mangroves and estuarine ecosystems, however, are distinct features of the Lowland or coastal physiographic region, making them least characteristic of the Midland.

Answer

A. Extensive laterite soil deposits and undulating terrain.

Answer

B. Cultivation of diverse cash crops like rubber, pepper, and cashew.

Answer

C. Presence of numerous small to medium-sized rivers originating from the Western Ghats.

Question 4

The Travancore-Kochi merger agreement (1949) included a provision that allowed the former princely states to retain certain special rights. Which of the following rights was NOT retained by Travancore or Kochi under this agreement?

Accepted Answer

C. The right to levy income tax independently — Under the merger agreement, Travancore and Kochi retained control over religious institutions (Option A) and forest lands (Option B), but the central government took over the power to levy income tax (Option C), which was a key aspect of the merger. Option D is incorrect as police forces were integrated into a unified system under the new state.

Answer

A. Control over religious institutions and practices

Answer

B. Ownership of forest lands and mineral resources

Answer

D. The right to manage their respective police forces

Question 5

In Kerala's agricultural practices, which transport mode is most commonly used for the bulk movement of perishable goods like rubber and spices from rural farmlands to processing units?

Accepted Answer

A. Waterways — Kerala's extensive network of backwaters and rivers makes waterways the most cost-effective and traditional mode for transporting bulky perishable goods like rubber and spices. Railways and road transport are used but are less efficient for bulk movement to processing units. Air transport is prohibitively expensive for such low-value, high-volume goods.

Answer

B. Railways

Answer

C. Road transport

Answer

D. Air transport

Question 6

Hall-Héroult process extracts:‌​‍

Accepted Answer

Aluminium (electrolysis of Al₂O₃ in molten cryolite) — Cryolite (Na₃AlF₆) lowers m.p. ‌​‍from 2000°C to ~950°C. Carbon anode, steel cathode.

Answer

Zinc

Answer

Iron

Answer

Copper

Question 7

Pollen grain wall — outer layer:

Accepted Answer

Exine (sporopollenin — most resistant biological material) — Sporopollenin resists enzymes, acids, bases, high temperature. Pollen fossils preserved for millions of years.

Answer

Intine

Answer

Cellulose

Answer

Endosperm

Question 8

Which of the following institutions is responsible for advising the Kerala government on matters related to administrative reforms and public administration?

Accepted Answer

C. Kerala State Institute of Public Administration and Rural Development (KSIPARD) — The Kerala State Institute of Public Administration and Rural Development (KSIPARD) is tasked with advising the government on administrative reforms and public administration. The Public Service Commission handles recruitment, the Administrative Tribunal deals with service matters, and the Vigilance Bureau focuses on anti-corruption, making them incorrect.

Answer

A. Kerala Public Service Commission

Answer

B. Kerala Administrative Tribunal

Answer

D. Kerala State Vigilance and Anti-Corruption Bureau

Question 9

An echo is produced by:‌​‍

Accepted Answer

Reflection of sound — Echo = reflection of sound from a surface. ‌​‍Needs minimum 17.2m distance from the reflecting surface.

Answer

Refraction of sound

Answer

Absorption of sound

Answer

Diffraction of sound

Question 10

UMANG app under Digital India provides:‌​‍

Accepted Answer

e-Governance services on mobile — UMANG (Unified Mobile Application for New-age Governance) provides access to multiple government services via a single app.‌​‍

Answer

Digital land records only

Answer

AI chatbot assistance

Answer

Unified payment interface

DCOA Mixed Practice Test #765